Spinning top toy

ABSTRACT

A spinning top toy includes a shaft part including a rotating shaft arranged to be in contact with a floor when spinning and a body being configured on the shaft part. The body includes a guide groove extending in a direction from the rotating shaft to an outer periphery of the body, the guide groove including a step, and a first spherical-shaped weight member being stored and movable in the guide groove.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority under 35 U.S.C. 119 to Japanese Patent Application No. 2017-035126, filed on Feb. 27, 2017. The contents of this application are incorporated herein by reference in their entirety.

BACKGROUND OF THE INVENTION Field of the Invention

The present invention relates to a spinning top toy.

Description of the Related Art

As battle games using spinning top toys, by applying impact to the spinning top toys each other, there are cases in which the rotation of the spinning top toy of an opponent is stopped by the impact force; the spinning top toy of the opponent is flicked out by the impact force, or the spinning top toy of the opponent is disassembled by the impact force, etc.

For example, in the spinning top toy described in Japanese Registered Utility Model Application Publication No. 3071767, it is designed to improve an offensive power or to keep a stable rotation by controlling a rotation balance automatically in response to a rotation speed. Specifically, the spinning top toy described in Japanese Registered Utility Model Application Publication No. 3071767, a plurality of guide grooves, which are inclined upward from a rotation center side toward an outer peripheral side and which radially extend, are provided in the spinning top toy body. A weight member such as a metal ball, etc. is movably arranged in the inside of each guide groove.

In the case of the spinning top toy described in Japanese Registered Utility Model Application Publication No. 3071767, at a time of fast speed rotation, the metal balls are moved toward the outer peripheral side (peripheral edge part) along the guide grooves by the centrifugal force. Accordingly, the inertia moment of the spinning top toy becomes large, and therefore, it improves the offensive power (increases impact force) at the time of a battle game. Further, at a time of slow speed rotation, the metal balls are moved toward the center side along the guide grooves. Accordingly, the inertia moment of the spinning top toy becomes small, and the rotation of the spinning top toy is stabilized.

However, in the spinning top toy described in Japanese Registered Utility Model Application Publication No. 3071767, since each guide groove has a uniform slope, even though the rotation variation is small, the weight member is moved in the guide groove. As a result, it is easy to change the inertia moment of the spinning top toy, so that in fact, there is a possibility that the rotation may not be stabilized.

The description herein of advantages and disadvantages of various features, embodiments, methods, and apparatus disclosed in other publications is in no way intended to limit the present invention. For example, certain features of the preferred described embodiments of the invention may be capable of overcoming certain disadvantages and/or providing certain advantages, such as, e.g., disadvantages and/or advantages discussed herein, while retaining some or all of the features, embodiments, methods, and apparatus disclosed therein.

SUMMARY OF THE INVENTION

The disclosed embodiments of the present invention have been developed in view of the above-mentioned and/or other problems in the related art. The disclosed embodiments of the present invention can significantly improve upon existing methods and/or apparatuses.

The present invention was created considering the aforementioned conventional status. An object is to provide a spinning top toy to improve the rotational stability in comparison with the conventional spinning top toy, and to be capable of appropriately changing the inertia moment in response to a rotation speed.

In some embodiments of the present disclosure, a spinning top toy includes a shaft part including a rotating shaft arranged to be in contact with a floor when spinning; and a body being configured on the shaft part. The body includes a guide groove extending in a direction from the rotating shaft to an outer periphery of the body, the guide groove including a step, and a first spherical-shaped weight member being stored and movable in the guide groove.

In some embodiments of the present disclosure, the guide groove extends upwardly from the rotating shaft to the outer periphery.

In some embodiments of the present disclosure, the guide groove includes a first groove, and first and second branch grooves to which the first groove bisects, the first groove is configured closer to a center of the rotating shaft than the first and second branch grooves, and the step is configured in the first branch grooves.

In some embodiments of the present disclosure, the body includes a second spherical-shaped weight member being stored and movable in the guide groove.

In some embodiments of the present disclosure, at least one of the first and second branch grooves has a width being large enough to store the first spherical-shaped weight member.

In some embodiments of the present disclosure, the body includes a second guide groove extending in a direction from the rotating shaft to the outer periphery of the body.

In some embodiments of the present disclosure, the first guide groove is configured opposite to the second guide groove across a center of the rotating shaft.

The above and/or other aspects, features and/or advantages of various embodiments will be further appreciated in view of the following description in conjunction with the accompanying figures. Various embodiments can include and/or exclude different aspects, features and/or advantages where applicable. In addition, various embodiments can combine one or more aspect or feature of other embodiments where applicable. The descriptions of aspects, features and/or advantages of particular embodiments should not be construed as limiting other embodiments or the claims. In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. Like numbers refer to like elements throughout. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items and may be abbreviated as “/”. It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. Unless indicated otherwise, these terms are only used to distinguish one element from another. For example, a first object could be termed a second object, and, similarly, a second object could be termed a first object without departing from the teachings of the disclosure. It will be further understood that the terms “comprises” and/or “comprising,” or “includes” and/or “including” when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being “connected” or “coupled” to or “on” another element, it can be directly connected or coupled to or on the other element or intervening elements may be present. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present. Other words used to describe the relationship between elements should be interpreted in a like fashion (e.g., “between” versus “directly between,” “adjacent” versus “directly adjacent,” etc.). However, the term “contact,” as used herein refers to direct contact (i.e., touching) unless the context indicates otherwise. Terms such as “same,” “planar,” or “coplanar,” as used herein when referring to orientation, layout, location, shapes, sizes, amounts, or other measures do not necessarily mean an exactly identical orientation, layout, location, shape, size, amount, or other measure, but are intended to encompass nearly identical orientation, layout, location, shapes, sizes, amounts, or other measures within acceptable variations that may occur, for example, due to manufacturing processes. The term “substantially” may be used herein to reflect this meaning. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and/or the present application, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1(A) is a perspective view explaining a spinning top toy according to an embodiment of the present invention.

FIG. 1(B) is a diagram explaining how to play with the spinning top toy.

FIG. 2 is an exploded perspective view showing a spinning top toy according to the present embodiment.

FIG. 3 is an exploded cross-sectional perspective view showing the spinning top toy according to the present embodiment.

FIG. 4 is a plane view showing a body in the spinning top toy according to the present embodiment.

FIG. 5(A) is an operation diagram indicating an engagement state of a spinning top toy body, a body part, and a flywheel in the spinning top toy according to the present embodiment.

FIG. 5(B) is an operation diagram indicating an engagement state of a spinning top toy body, a body part, and a flywheel in the spinning top toy according to the present embodiment.

FIG. 6 is a perspective view showing an example of a launcher which rotationally drive the spinning top toy according to the present embodiment.

FIG. 7(A) is an explanatory diagram showing a movement of weight members in the spinning top toy according to the present invention.

FIG. 7(B) is an explanatory diagram showing a movement of weight members in the spinning top toy according to the present invention.

FIG. 7(C) is an explanatory diagram showing a movement of weight members in the spinning top toy according to the present invention.

FIG. 8 is a diagram showing a modification example of the spinning top toy according to the present embodiment.

DETAILED DESCRIPTION

In the following paragraphs, some embodiments of the invention will be described by way of example and not limitation. It should be understood based on this disclosure that various other modifications can be made by those in the art based on these illustrated embodiments.

Hereinafter, a spinning top toy of the present invention will be described based on embodiments shown in the drawings.

<Whole Structure>

FIG. 1(A) is a perspective view explaining a spinning top toy according to an embodiment of the present invention. FIG. 1(B) is a diagram explaining how to play with the spinning top toy. FIG. 2 is an exploded perspective view showing the spinning top toy according to the present embodiment. FIG. 3 is an exploded cross-sectional perspective view of the spinning top toy according the present embodiment. FIG. 4 is a plane view showing a body 40 which will be described later. In the present specification, the terms “top”, “bottom”, “left”, “right”, “front”, and “back” refer to the corresponding directions in FIGS. 2 and 3.

As shown in FIG. 1(A), the spinning top toy 1 is arranged to be used for, so called, battle games. Specifically, the spinning top toy 1 can be used for battle games in which the spinning top toy 1 collides with and disassembles the opponent with disassembling structure by the impact force as shown in FIG. 1(B), so that the player wins.

As shown in FIGS. 2 and 3, the spinning top toy 1 is provided with a shaft part 10, which constitutes a lower part structure, and a performance variable ring 30 and a body 40, which constitute an upper part structure.

<Detail Structure>

As shown in FIGS. 2 and 3, the shaft part 10 is provided with a rotating shaft 11 at the lower part, a flange 12 at the middle region, and a cylindrical part 13 at the upper part.

Among the parts, the flange 12 and the cylindrical part 13 are integrally formed, so as to constitute the upper part of the shaft part, and the flange 12 and the cylindrical part 13 are fastened to the lower part of the shaft part by screws (omitted in the drawings). The diameter of the lower part of the shaft part has a shape narrowing down stepwise in a direction from the flange 12 side to the top end side of the rotating shaft 11, and it is formed in an inverted conical shape as a whole.

In the flange 12 and the cylindrical part 13, a hole 14 is formed in each of two sections which are faced each other in the front-and-back direction across an axis Ax of the rotating shaft 11 (hereinafter referred to as “axis Ax”), which corresponds to the axis of the spinning top toy 1 as a whole in the vertical direction. On the other hand, in the lower part of the shaft part, overhanging pieces 11 a are formed radially outward in the positions corresponding to the holes 14 of the flange 12. The overhanging pieces 11 a are positioned in the lower side of the holes 14 of the flange 12.

Further, in the cylindrical part 13, a projection part 15 is formed in each of two sections which are faced each other in the right-and-left direction across the axis Ax. The outer surface of the projection part 15 shares a plane with the outer peripheral surface of the flange 12. Further, in the lower part of the shaft part, projection parts 11 b which overhang radially outward in the positions corresponding to the projection parts 15 are formed. The flange 12 and the cylindrical part 13 are fastened to the lower part of the shaft part in the sections of the projection parts 15, 11 b by screws (omitted in the drawings).

Further, a columnar body 16 is vertically installed inside the cylindrical part 13. The base end part of the columnar body 16 is connected to the lower part of the shaft part. The top end of the columnar body 16 is not particularly limited, but it is arranged higher than the position of the top end of the cylindrical part 13. In the top end part of the columnar body 16, a hook 17 stretching out in the outward radial direction at each of two sections, which are faced each other in the front-and-back direction across the axis Ax, is formed.

Further, a cylindrical shaped urging member 18 is provided in the shaft part 10. The urging member 18 is made of synthetic resin but it may be made of a metal. The urging member 18 is placed to surround the outer periphery of the columnar body 16 inside the cylindrical part 13.

The urging member 18 is provided with a cylindrical part 18 a, a ceiling part 18 b, and a leg part 18 c.

The ceiling part 18 b is provided on the top end of the cylindrical part 18 a. In the ceiling part 18 b, a hole 18 d which has a shape corresponding to the top end part of the columnar body 16 is formed.

Further, leg parts 18 c are provided in the outer peripheral lower end part of the cylindrical part 18 a. The leg part 18 c is formed at each of two sections which are faced each other in the front-and-back direction across the axis Ax.

The urging member 18 with such structure is provided in a manner in which the leg parts 18 c are inserted to the holes 14. The dimension of the holes 14 in the vertical direction is set larger than the length dimension of the leg parts 18 c. The urging member 18 is energized in the upward direction by a coil spring 20. At the upper end of the holes 14, the upward movement of the leg parts 18 c of the urging member 18 is restricted, and in the normal condition, the top end of the urging member 18 is positioned at the same height as the top end of the cylindrical part 13.

Further, at the upper surface of the ceiling part 18 b of the urging member 18, a protruding strip (projection) 21, which extends in radial direction, is formed at each of two sections which are faced each other in the right-and-left direction across the axis Ax.

2. Regarding a Performance Variable Ring 30

In this embodiment, a flywheel is used as a performance variable ring 30. The performance variable ring 30 has a plate like shape. At the bottom surface of the performance variable ring 30, an annular step part 31, which is capable of storing the flange 12 of the shaft part 10 from the lower side, is formed. Further, in the upper surface of the performance variable ring 30, a projection part 32, which stretches out in the upper direction, is formed at each of two sections which are faced each other in the right-and-left direction across the axis Ax. In the lower side part of each projection part 32, a recessed part 33, which is capable of storing the projection part 15 of the shaft part 10 from the lower side, is formed. Further, in the upper surface of the performance variable ring 30, a tongue-piece part 34, which extends upward, is formed directly outside each projection part 32. The tongue-piece part 34 projects more upward than the projection part 32. As the performance variable ring 30, substituting the flywheel or integrating with the flywheel, there may be one having a projection part on the outer peripheral surface, so as to easily attack the spinning top toy 1 of the opponent, or there may be one having a recessed part on the outer peripheral surface, so as to defend from the attack from the spinning top toy 1 of the opponent.

3. Regarding a Body 40

The body 40 has a disk shape and the axis Ax is defined as a central axis. The body 40 is provided with a base 400 and a transparent cover body 401 which has a substantially identical shape with the base 400 viewed from top and which is a lid part covering the top of the base 400.

In the outer periphery of the body 40, protrusions and recesses 40 a are formed. Further, in the center of the base 400, a circular hole 41 is formed. The aforementioned transparent cover body 401 covers the part except the circular hole 41 and arcuate slits 46 which will be described later. In FIG. 3, the illustration of the transparent cover body 401 is omitted. Further, in the lower surface of the body 40, an annular-shaped recess part 42 which is capable of storing the projection part 32 of the performance variable ring 30 from the lower side is formed.

At the lower end of the inner circumferential surface of the inner circumferential wall 43 a which partitions and forms the annular-shaped recess part 42, a hook 44 which overhangs in the inward radial direction projects at each of two sections which are faced each other in the front-and-back direction across the axis Ax.

At the middle region in the vertical direction of the inner circumferential surface of the inner circumferential wall 43 a, a protrusion 47 which overhangs in the inward radial direction projects at each of two sections which are faced each other in the right and left direction across the axis Ax.

Further, at the lower end surface of the inner circumferential wall 43 a, a raised part 45 in which protrusions and recesses are continuously formed so as to engage with the protruding strips 21 is formed at each of two sections which are faced each other in the right-and-left direction across the axis Ax.

Further, at the ceiling wall 43 b which partitions and forms the annular-shaped recess part 42 of the body 40, an arcuate slit 46, to which the tongue-piece part 34 of the performance variable ring 30 can be inserted from the lower side, is formed in each of two sections which are faced each other across the axis Ax. The circumferential length of the arcuate slit 46 is the length for which the tongue-piece part 34 can be sufficiently moved.

At the upper surface of the base 400 of the body 40, a guide groove 48, which extends from the axis Ax side (inner peripheral side) to the outer peripheral side with an upward slope, is formed at each of two sections which are faced each other in the front-and-back direction across the axis Ax. The guide groove 48 is used for guiding ball-shaped weight members 49 in a rolling manner inside the guide groove 48, and in the present embodiment, two weight members 49 are stored.

Specifically, as shown in FIG. 4, the guide groove 48 has one base end groove 481, which is positioned in the axis Ax side, and two branch grooves 482, which branch from the base end groove 481 and are positioned in the outer peripheral side, so that it is formed substantially in a Y-shape. In any of these grooves, a width in which one weight member 49 is stored, that is, the width corresponding to the dimension of the weight member 49 is formed.

Among these grooves, the base end groove 481 is formed substantially radially along the radial direction of the base 400.

The two branch grooves 482 are approximately equally divided (approximately symmetric with respect to the base end groove 481) toward the right and left oblique outer peripheral side in a plane view from the outer peripheral end of the base end groove 481.

Among the two branch grooves 482, the first branch groove 482 a, which is positioned in a rotation direction front side of the body 40 (right side toward the outer peripheral side in a plane view), is connected to the base end groove 481 smoothly without any gap.

On the other hand, the second branch groove 482 b, which is positioned in the rotation direction back side of the body 40 (left side toward the outer peripheral side in a plane view), has a gap 483 and connects with the base end groove 481, so that the bottom becomes higher position than the base end groove 481. The gap 483 is provided in the base end part of the second branch groove 482 b in a manner in which the outside of the connection part between the base end groove 481 and the first branch groove 482 a in the bending direction is smoothly connected in a plane view. Further, the height of the gap 483 is set as the height of the radius of the weight member 49.

The base end groove 481 and the two branch grooves 482 are formed in approximately same length. Specifically, each of the base end groove 481 and the first branch groove 482 a is formed in the length from the top end to the center of the connection part 484 which is approximately 1.5 times of the diameter of the weight member 49, so as to position one of the weight members 49 at the center of the connection part 484 of the three grooves when one of the weight members 49 is positioned at the top end of the grooves (see FIGS. 7(A) and 7(B)). Further, the second branch groove 482 b is formed in the length from the gap 483 to the top end which is equal to the diameter of the weight member 49 (see FIG. 7(C)).

As shown in FIGS. 2 and 3, in the circular hole 41 of the body 40, an identification part 60 is mounted. The identification part 60 is used for the identification of the spinning top toy 1 or the identification of a player.

As the identification, in the present embodiment, a plurality of identification parts in which decorations and/or colors, etc. are different are offered, and one of the identification parts which is selected by the player is mounted in the circular hole 41.

The identification part 60 has approximately short cylindrical shape as a whole. The central part of the upper surface of the identification part 60 is recessed in a cone shape, and in the edge part surrounding the recess, a recessed part for operation 61 is formed at two sections which are faced each other across the axis Ax. The recessed part for operation 61 is arranged in a way, such that the flange 12 of the shaft part 10 can be inserted, and the identification part 60 can be operated by moving the shaft part 10 which is inserted in the recessed part for operation 61.

In the outer periphery of the identification part 60, at each of two sections which are faced each other across the axis, a groove 62 is formed. The aforementioned protrusion 47 is inserted in the groove 62, when the identification part 60 is inserted to the circular hole 41 of the body 40. The groove 62 has a part, which extends in the vertical direction and opens to the lower side of the identification part 60, and a part, which extends along the substantially circumferential direction from the top end of this part. After the protrusions 47 of the circular hole 41 are moved along the groove 62 and the identification part 60 is inserted to the circular hole 41 of the body 40 from the upper side, it is rotated, so that the identification part 60 is mounted to the circular hole 41 of the body 40.

<<Assembly Method>>

Next, an example of an assembly method of the spinning top toy 1 will be described.

FIG. 5 is a diagram explaining an engagement state of the shaft part 10, the performance variable ring 30, and the body 40.

Here, it is assumed that the assembly of the shaft part 10 has been already finished. Further, it is assumed that the assembly of the identification part 60 to the circular hole 41 of the body 40 has been also finished.

First, the shaft part 10 and the performance variable ring 30 are assembled in a fitting state in a manner in which the projection parts 15 of the shaft part 10 are engaged to the recessed parts 33 of the performance variable ring 30 from the lower side. Next, the assembled body is brought close to the body 40 from the lower side. At this point, the tongue-piece parts 34 of the performance variable ring 30 of the aforementioned assembled body are engaged with a predetermined end of the arcuate slits 46 of the body 40 (FIG. 5(A)). In this state, the hooks 17 of the shaft part 10 are not overlapped with the hooks 44 of the body 40 in the vertical direction. This is the state capable of being disassembled. After that, the shaft part 10 of the aforementioned assembled body is pressed to the body 40 side. Then, first, the performance variable ring 30 is pressed against the lower surface of the body 40. Further, the coil spring 20 is contracted, so that the hooks 17 of the shaft part 10 are relatively pushed more upward than the hooks 44 of the body 40. The shaft part 10 is integrally rotated with the performance variable ring 30 with respect to the body 40 until the tongue-piece part 34 moves to the end which is the opposite side of the predetermined end (FIG. 5(B)). In this case of the rotation, it is the relative rotation between the body 40 and the performance variable ring 30 and the shaft part 10, and FIG. 5(B) shows the state in which the body 40 side is rotated with respect to the shaft part 10 and the performance variable ring 30. And then, it becomes the state in which the hooks 17 of the shaft part 10 and the hooks 44 of the body part 40 are vertically overlapped. When a hand is released from the shaft part 10, the lower surface of the hooks 17 of the shaft part 10 and the upper surface of the hooks 44 of the body 40 abut by the urging force of the coil spring 20.

This state in which the lower surface of the hooks 17 of the shaft part 10 and the upper surface of the hooks 44 of the body 40 abut is the assembled state. With such structure, the shaft part 10, the performance variable ring 30, and the body 40 are assembled, so that the spinning top toy 1 is assembled.

<<How to Play>>

Next, an example of how to play with the spinning top toy 1 will be described.

In the example of how to play, by spinning the spinning top toy 1, a battle is performed with the opponent.

In this case, a charge of the spinning force of the spinning top toy 1 is performed by the launcher 50 as shown in FIG. 6. In the inside part, the launcher 50 is provided with a disk which is not shown, and the disk is energized in one rotational direction by the power spring which is not shown. When the string, which is not shown, wound around the disk is pulled by a handle 51, the disk is rotated, and therefore, the spinning top holder 53 is rotated. The rotation of the spinning holder 53 is transmitted to the spinning top 1 by the forks 54 projecting downward, so that the spinning top toy 1 is rotated. In this case, the forks 54 are inserted to the arcuate slits 46 of the body part 40. When the handle 51 of the launcher 50 is pulled to the end, the rotation of the disk and further, the spinning top holder 53 is stopped. On the other hand, the spinning top toy 1 is rotated further by the inertia force, so that the spinning top toy 1 is released from the spinning top holder 53 in accordance with the tilting faces 54 a of the forks 54. The reference numeral 52 in FIG. 6 denotes a rod which is capable of protruding from and retracting into the spinning top holder 53. When the spinning top toy 1 is mounted to the spinning top holder 53, the rod 52 is pressed by the upper surface of the spinning top toy 1 so as to be retracted to the spinning top holder 53. For example, the rod 52 is used to detect whether the spinning top toy 1 is mounted or detached.

The spinning top toy 1 which is launched in such manner, is rotated in a predetermined field. When it collides with the spinning top toy 1 of the opponent, by the impact fore or the frictional force, etc. of the collision, the opposite direction force, which is opposite to the rotation direction of the shaft part 10 and the performance variable ring 30, is applied to the body 40. With this, the body part 40 is relatively rotated to the direction opposite to the rotation direction of the shaft part 10 and the performance variable ring 30.

And then, the protruding strips 21 are engaged with the raised parts 45 of the lower surface of the body 40 (see FIG. 5). In this case, since the urging force of the coil spring 20 is applied to the protruding strips 21, every time the impact force is applied by the collision, the shaft part 10 is relatively rotated with respect to the body 40 and the engagement position is changed. When it reaches the locking releasing position, the hooks 44 of the body 40 are removed from the hooks 17 of the shaft part 10, so that the body 40 is separated from the shaft part 10 by the urging force of the coil spring 20. As shown in FIG. 1(B), the spinning top toy 1 is disassembled.

Further, in the spinning top toy 1, the weight members 49 which are stored in the guide grooves 48 of the body 40 are moved inside the guide grooves 48 by increase or decrease of the centrifugal force in response to the rotation speed of the spinning top toy 1.

Specifically, first, at the time of low speed rotation, since it is not enough to apply the centrifugal force to the weight members 49 to climb the tilting surface of the guide grooves 48, as shown in FIG. 7(A), two weight members 49 are positioned in the inner peripheral side of the guide groove 48. Precisely, the weight member 49 of the inner peripheral side is positioned at the top end (inner peripheral edge) of the base end groove 481, and the weight member 49 of the outer peripheral side is positioned at the connection part 484 in a contact state with the weight member 49 of the inner peripheral side. Therefore, at the time of low speed rotation, the inertia moment of the spinning top toy 1 (body 40) is relatively small, so that the spinning top toy 1 is easily rotated.

After that, when the rotation speed increases, as shown in FIG. 7(B), the centrifugal force, which is applied to the weight members 49, increases, and the weight members 49 climb the tilting surface of the guide grooves 48 and are moved toward the outer peripheral side. At this time, since the movement from the base end groove 481 to the second branch groove 482 b is restricted by the gap 483, the weight member 49 of the outer peripheral side is moved to the top end (outer peripheral edge) of the first branch groove 482 a, and the weight member 49 of the inner peripheral side is moved to the connection part 484 and is in a contact state with the weight member 49 of the outer peripheral side. With this, since the inertia moment of the spinning top toy 1 (body 40) increases, the variation of the rotation speed is suppressed, and the offensive power (impact force) to the spinning top toy 1 of the opponent increases.

When the spinning top toy 1 collides with the spinning top toy of the opponent, or when the rotation speed increases further, as shown in FIG. 7(C), since the impact at the time of collision or the centrifugal force increases, the weight member 49 of the inner peripheral side climbs over the gap 483 and is moved to the top end of the second branch groove 482 b. With this, the inertia moment of the spinning top toy 1 (body 40) increases more, the variation of the rotation speed is further suppressed, and the offensive power (impact force) to the spinning top toy 1 of the opponent increases further.

As described above, according to the spinning top toy 1 of the present embodiment, since the weight members 49 stored in the guide grooves 48 of the body 40 are moved (rolled) inside the guide grooves 48 by increase or decrease of the centrifugal force in response to the rotation speed of the spinning top toy 1, the inertia moment of the body 40 changes in response to the rotation side. At this time, since the movement of the weight members 49 is restricted by the gap 483 formed in the middle of the guide groove 48, the inertia moment of the body 40 changes progressively.

With this, the variation of the inertia moment in response to the rotation speed can be limited in comparison with the conventional one in which the guide grooves simply radially extend, so that the rotational stability can be improved.

Therefore, while improving the rotational stability in comparison with the conventional one, the inertia moment can be appropriately changed in response to the rotation speed, and the attractiveness of the spinning top toy 1 can be enhanced.

Modification Example of the Present Invention

The embodiments of the present invention were described above, but the present invention is not limited to the aforementioned embodiments, and needless to say, various modifications may be made within the scope that does not depart from the essential point of the present invention.

For example, in the aforementioned embodiments, the weight members 49 are guided by the guide groove 48, which is branched in the Y-shape, but the shape, etc. is not particularly limited as long as the guide groove 48 extends in the direction from the axis Ax side to the outer peripheral side and a gap is formed in the middle.

For example, as shown in FIG. 8, guide grooves 48A which simply radially extend along the radial direction of the body 40 and have the gap 483A in the middle may be provided. Further, the guide grooves 48 may have a slope which inclines upward in the direction from the axis Ax side to the outer peripheral side.

Further, the number or the position of the guide grooves 48 is not particularly limited. One guide groove 48 may be provided, or more than three guide grooves 48 may be arranged on the periphery, etc.

Further, the number of weight members 49 stored in the guide grooves 48 is not particularly limited. In the case of the guide grooves which are not branched as shown in FIG. 8, only one weight member 49 may be stored.

Moreover, a plurality of weight members 49 may be moved in series in the guide grooves 48. Among the two branch grooves, it is preferable that at least the first branch groove 482 a which does not include the gap 483 has the width which can store one weight member 49.

Further, the guide grooves 48 may be offset in the tangential direction of the body 40, or the base end groove 481 may be inclined with respect to the radial direction of the body 40.

Further, in the aforementioned embodiments, among the two branch grooves 482, there is no gap in the first branch groove 482 a of the front side of the rotation direction, and the gap 483 is provided in the second branch groove 482 b of the back side of the rotation direction. However, it may be reversed, so as to provide the gap 483 in the other one of the branch grooves 482.

The terms and descriptions used herein are used only for explanatory purposes and the present invention is not limited to them. Accordingly, the present invention allows various design-changes falling within the claimed scope of the present invention.

While the present invention may be embodied in many different forms, a number of illustrative embodiments are described herein with the understanding that the present disclosure is to be considered as providing examples of the principles of the invention and such examples are not intended to limit the invention to preferred embodiments described herein and/or illustrated herein.

While illustrative embodiments of the invention have been described herein, the present invention is not limited to the various preferred embodiments described herein, but includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of aspects across various embodiments), adaptations and/or alterations as would be appreciated by those in the art based on the present disclosure. The limitations in the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the present specification or during the prosecution of the application, which examples are to be construed as non-exclusive. For example, in the present disclosure, the term “preferably” is non-exclusive and means “preferably, but not limited to.” In this disclosure and during the prosecution of this application, the terminology “present invention” or “invention” is meant as a non-specific, general reference and may be used as a reference to one or more aspects within the present disclosure. The language present invention or invention should not be improperly interpreted as an identification of criticality, should not be improperly interpreted as applying across all aspects or embodiments (i.e., it should be understood that the present invention has a number of aspects and embodiments), and should not be improperly interpreted as limiting the scope of the application or claims. In this disclosure and during the prosecution of this application, the terminology “embodiment” can be used to describe any aspect, feature, process or step, any combination thereof, and/or any portion thereof, etc. In some examples, various embodiments may include overlapping features.

EFFECT

According to the aforementioned spinning top toy, since the weight member stored in the guide groove of the body is moved (rolled) inside the guide groove by increase or decrease of the centrifugal force in response to the rotation speed of the spinning top toy, the inertia moment of the body changes in response to the rotation side. At this point, since the movement of the weight member is restricted by the gap formed in the middle of the guide groove, the inertia moment of the body changes gradually.

With this, the variation of the inertia moment in response to the rotation speed can be limited in comparison with the conventional one in which the guide groove simply radially extends, so that the rotational stability can be improved.

Therefore, while improving the rotational stability in comparison with the conventional one, the inertia moment can be appropriately changed in response to the rotation speed. 

What is claimed is:
 1. A spinning top toy, comprising: a shaft part including a rotating shaft arranged to be in contact with a floor when spinning; and a body being configured on the shaft part, the body including a first guide groove extending in a direction from the rotating shaft to an outer periphery of the body, the first guide groove including a step, and a first spherical-shaped weight member being stored and movable in the first guide groove.
 2. The spinning top toy according to claim 1, wherein the first guide groove extends upwardly from the rotating shaft to the outer periphery.
 3. The spinning top toy according to claim 1, wherein the first guide groove includes a first groove, and first and second branch grooves to which the first groove bisects, the first groove is configured closer to a center of the rotating shaft than the first and second branch grooves, and the step is configured in the first branch grooves.
 4. The spinning top toy according to claim 3, wherein the body includes a second spherical-shaped weight member being stored and movable in the first guide groove.
 5. The spinning top toy according to claim 4, wherein at least one of the first and second branch grooves has a width being large enough to store the first spherical-shaped weight member.
 6. The spinning top toy according to claim 1, wherein the body includes a second guide groove extending in a direction from the rotating shaft to the outer periphery of the body.
 7. The spinning top toy according to claim 6, wherein the first guide groove is configured opposite to the second guide groove across a center of the rotating shaft. 